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2 171 371

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Application

2000110917/03, 2000-04-25

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Start date

2000-04-25

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Actual filing date

2000-04-25

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Published

2001-07-27

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Inventor

Nazmiev I.M.Galljamov I.M.Shajdullin F.D.Nemish D.D.Islanov Sh.G.Vakhitova A.G.

(73)

Holder

Oao Aktsionernaja Neftjanaja Kompanija Bashneft'

METHOD OF ACID TREATMENT OF FRACTURED-POROUS RESERVOIRS WITH HIGH RATE OF WATER ENCROACHMENT Russian patent published in 2001 - IPC

Abstract RU 2171371 C1

FIELD: oil producing industry, particularly, methods of treatment of nonuniform permeable formations at late stage of development and methods of shutoff of water inflows. SUBSTANCE: method includes injection of polymer, fresh water and acid into formation. Polymer is used in from of wastes of fiber or cloth of polyacrylonitrile hydrolyzed in alkali. In so doing, prior to injection of polymer, pore channels are saturated with alumino-containing fluid in form of waste of isopropylbenzene production, and then, buffer layer of fresh water is injected. After injection of polymer, fresh water and acid are injected. EFFECT: reduced cost of process, use of inexpensive reagents, additional oil recovery. 4 tbl

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RU 2 171 371 C1

Authors

Nazmiev I.M.

Galljamov I.M.

Shajdullin F.D.

Nemish D.D.

Islanov Sh.G.

Vakhitova A.G.

Dates

2001-07-27—Published

2000-04-25—Filed

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